C#读取电池电量值

/// <summary>

/// 检查系统电源状态

/// 该状态指示系统是否运行在交流电或直流电源，是否电池正处流电状态，电池还有多少寿命

/// </summary>

/// <param name="lpSystemPowerStatus"></param>

[DllImport("kernel32", EntryPoint = "GetSystemPowerStatus")]

private static extern void GetSystemPowerStatus(ref SYSTEM_POWER_STATUS lpSystemPowerStatus);

private struct SYSTEM_POWER_STATUS

{

public Byte ACLineStatus; //0 = offline, 1 = Online, 255 = UnKnown Status.

public Byte BatteryFlag;

public Byte BatteryLifePercent;

public Byte Reserved1;

public int BatteryLifeTime;

public int BatteryFullLifeTime;

}

/// <summary>

/// 读取交流电源线的连接状态

/// </summary>

/// <returns></returns>

private string ReadAlternatingCurrentConnectState()

{

string AlternatingCurrentConnectState = ""; //交流供电情况

//申明一个结构对象，通过引用将值传到这个对象

SYSTEM_POWER_STATUS SysPower = new SYSTEM_POWER_STATUS();

GetSystemPowerStatus(ref SysPower);

if (SysPower.ACLineStatus == 1)

{//处于在线状态

AlternatingCurrentConnectState = "Online";

}

else if (SysPower.ACLineStatus == 0)

{//处于离线状态

AlternatingCurrentConnectState = "Offline";

}

else

{//未知状态

AlternatingCurrentConnectState = "UnKnown";

}

return AlternatingCurrentConnectState;

}

/// <summary>

/// 读取电池状态信息

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void ReadBatteryInfo()

{

try

{

ManagementClass mc = new ManagementClass("Win32_Battery");

ManagementObjectCollection moc = mc.GetInstances();

ManagementObjectCollection.ManagementObjectEnumerator mom = moc.GetEnumerator();

if (mom.MoveNext())

{

//读取当前剩余的电量

RemainElectricQuantity = Convert.ToInt32(mom.Current.Properties["EstimatedChargeRemaining"].Value);

this.label3.Text = RemainElectricQuantity.ToString();

//读取当前设备ID编号

this.label4.Text = Convert.ToString(mom.Current.Properties["DeviceID"].Value);

//读取当前电池的名称

this.label5.Text = Convert.ToString(mom.Current.Properties["Name"].Value);

//label6.Text = Convert.ToString(mom.Current.Properties["Status"].Value);

}

else

{

//当不能正确地获得所需要的值时

this.label3.Text = "Can't Get the value";

}

}

catch (Exception)

{//写入文件异常，这个地方一般是由于使用了非超级管理员权限向C盘写入了文件，报告权限不够

if (MessageBox.Show("Run me in the role of the super administrator!", "Information Tip:", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1) == DialogResult.OK)

{

this.Close();

}

}

//从配置文件里面读出电池电量上限值

BatteryMaxVal = (ReadConfigureInfo("$BatteryMaxVal$")).Replace("%", "");

//从配置文件里面读取电池电量下限值

BatteryMinVal = (ReadConfigureInfo("$BatteryMinVal$")).Replace("%", "");

if ((BatteryMaxVal.Trim() == "") || (BatteryMinVal.Trim() == ""))

{//如果上限值或下限值中有一个为空，那么就是配置文件中没有正确地设置配置文件

MessageBox.Show("Error in configuration file,please modify Upper and lower voltage limits!", "Information Tip:", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);

}

if (RemainElectricQuantity <= Convert.ToInt32(BatteryMaxVal) && RemainElectricQuantity >= Convert.ToInt32(BatteryMinVal))

{//当电量处于40%至80%之间的时候，满足出货的要求

this.label1.Text = "Pass";

}

else

{//不满足出货要求

this.label1.Text = "Fail";

}

}